Average Error: 0.4 → 0.4
Time: 51.0s
Precision: 64
Internal Precision: 128
\[\frac{1}{\sqrt{k}} \cdot {\left(\left(2 \cdot \pi\right) \cdot n\right)}^{\left(\frac{1 - k}{2}\right)}\]
\[\frac{{n}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)}}{\sqrt{k}} \cdot \left({\pi}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)} \cdot {2}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)}\right)\]

Error

Bits error versus k

Bits error versus n

Derivation

  1. Initial program 0.4

    \[\frac{1}{\sqrt{k}} \cdot {\left(\left(2 \cdot \pi\right) \cdot n\right)}^{\left(\frac{1 - k}{2}\right)}\]
  2. Initial simplification0.4

    \[\leadsto \frac{{\left(\pi \cdot \left(n \cdot 2\right)\right)}^{\left(\frac{1}{2} - \frac{k}{2}\right)}}{\sqrt{k}}\]
  3. Taylor expanded around inf 17.6

    \[\leadsto \frac{\color{blue}{e^{\left(\frac{1}{2} - \frac{1}{2} \cdot k\right) \cdot \left(\log \left(2 \cdot \pi\right) - \log \left(\frac{1}{n}\right)\right)}}}{\sqrt{k}}\]
  4. Simplified0.5

    \[\leadsto \frac{\color{blue}{{\left(2 \cdot \pi\right)}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)} \cdot {n}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)}}}{\sqrt{k}}\]
  5. Using strategy rm
  6. Applied *-un-lft-identity0.5

    \[\leadsto \frac{{\left(2 \cdot \pi\right)}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)} \cdot {n}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)}}{\color{blue}{1 \cdot \sqrt{k}}}\]
  7. Applied times-frac0.5

    \[\leadsto \color{blue}{\frac{{\left(2 \cdot \pi\right)}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)}}{1} \cdot \frac{{n}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)}}{\sqrt{k}}}\]
  8. Simplified0.5

    \[\leadsto \color{blue}{{\left(2 \cdot \pi\right)}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)}} \cdot \frac{{n}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)}}{\sqrt{k}}\]
  9. Using strategy rm
  10. Applied unpow-prod-down0.4

    \[\leadsto \color{blue}{\left({2}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)} \cdot {\pi}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)}\right)} \cdot \frac{{n}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)}}{\sqrt{k}}\]
  11. Final simplification0.4

    \[\leadsto \frac{{n}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)}}{\sqrt{k}} \cdot \left({\pi}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)} \cdot {2}^{\left((\frac{-1}{2} \cdot k + \frac{1}{2})_*\right)}\right)\]

Runtime

Time bar (total: 51.0s)Debug logProfile

BaselineHerbieOracleSpan%
Regimes0.40.40.00.40%
herbie shell --seed 2018354 +o rules:numerics
(FPCore (k n)
  :name "Migdal et al, Equation (51)"
  (* (/ 1 (sqrt k)) (pow (* (* 2 PI) n) (/ (- 1 k) 2))))